Question

A certain forest covers an area of 3900 km2 . Suppose that each year this area decreases by 7.75% . What will the area be after 15 years?

Answer 1

Answer:

1162.94 km²

Step-by-step explanation:

forest cover area = 3900 km²

Area decreases every year by = 7.75 %

area after 15 years(A) = ?

$A=P(1-\dfrac{r}{100})^{15}\\A =3900(1-\dfrac{7.75}{100})^{15}\\A = 1162.94 / km^2$                                      

so, the area of forest remaining after 15 years as it decreases by 7.75 % every year is equal to  1162.94 km²